A comparative study on thermal behavior of solid-state light trivalent lanthanide isonicotinates in dynamic dry air and nitrogen atmospheres

Autor(es)

Nunes, W. D. G. ^[1] ; Teixeira, J. A. ^[1] ; do Nascimento, A. L. C. S. ^[1] ; Caires, F. J. ^[2] ; Ionashiro, E. Y. ^[3] ; Ionashiro, M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Inst Quim, CP 355, BR-14801970 Araraquara, SP - Brazil

^[2] Univ Estadual Paulista, Fac Ciencias, BR-17033260 Bauru, SP - Brazil

^[3] Univ Fed Goias, Inst Quim, Campus Samambaia, BR-74690900 Goiania, Go - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY; v. 125, n. 1, p. 397-405, JUL 2016.
• Citações Web of Science: 4

Resumo

Characterization, thermal stability, and thermal decomposition of light trivalent lanthanide isonicotinates Ln(L)(3)center dot 2H(2)O (Ln = La to Gd, except Pm; L = isonicotinate) were investigated employing simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC), DSC, infrared spectroscopy (FTIR), evolved gas analysis by TG-DSC coupled to FTIR, elemental analysis, and complexometry. The dehydration of these compounds occurs in a single step, and the thermal decomposition of the anhydrous compounds occurs in one or two (air) and two or three steps (N-2). The final residues of thermal decomposition were CeO2, Pr6O11, and Ln(2)O(3) (Ln = La, Nd to Gd) in air atmosphere, while in N-2 atmosphere the mass loss is still being observed up to 1000 A degrees C. The results also provided information concerning the gaseous products evolved during the thermal decomposition in dynamic dry air and nitrogen atmospheres. (AU)

• Processo FAPESP: 13/09022-7 - Estudos termoanalíticos, síntese e caracterização dos co-cristais sólidos de alguns antibióticos (fluoroquinolonas) com alguns co-formadores
• Beneficiário: Massao Ionashiro
• Modalidade de apoio: Auxílio à Pesquisa - Regular